# All files / src/providers/openai Capabilities.ts

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71.59% Branches 63/88
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     import { ModelRegistry } from "../../models/ModelRegistry.js";
    import { PricingRegistry } from "../../models/PricingRegistry.js";
    import { ModelPricing } from "../../models/types.js";

    export class Capabilities {
      static getContextWindow(modelId: string): number | null {
        const val = ModelRegistry.getContextWindow(modelId, "openai");
        if (val) return val;

        if (/gpt-4.*(preview|turbo|vision|o)/.test(modelId) || /o1|o3/.test(modelId)) return 128_000;
        if (/gpt-4/.test(modelId)) return 8_192;
        if (/gpt-3\.5/.test(modelId)) return 16_385;
        return 128_000;
      }

      static getMaxOutputTokens(modelId: string): number | null {
        const val = ModelRegistry.getMaxOutputTokens(modelId, "openai");
        Iif (val) return val;

        if (/o1.*(pro|mini)|o3/.test(modelId)) return 65_536;
        if (/gpt-4o/.test(modelId)) return 16_384;
        return 4_096;
      }

      static supportsVision(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        if (model?.modalities?.input?.includes("image")) return true;

        return /gpt-4(?!-3)|o1/.test(modelId) && !/audio|realtime|voice/.test(modelId);
      }

      static supportsTools(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        if (model?.capabilities?.includes("function_calling") || model?.capabilities?.includes("tools"))
          return true;

        return !/embedding|moderation|dall-e|tts|whisper/.test(modelId);
      }

      static supportsStructuredOutput(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        if (model?.capabilities?.includes("structured_output")) return true;

        return /gpt-4|o1|o3/.test(modelId);
      }

      static supportsJsonMode(modelId: string): boolean {
        return this.supportsStructuredOutput(modelId);
      }

      static supportsEmbeddings(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        Iif (model?.modalities?.output?.includes("embeddings")) return true;

        return /embedding/.test(modelId);
      }

      static supportsImageGeneration(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        Iif (
          model?.capabilities?.includes("image_generation") ||
          model?.modalities?.output?.includes("image")
        )
          return true;

        return /dall-e|image/.test(modelId);
      }

      static supportsTranscription(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        Iif (model?.modalities?.input?.includes("audio")) return true;

        return /whisper|audio|transcribe/.test(modelId);
      }

      static supportsModeration(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        Iif (model?.modalities?.output?.includes("moderation")) return true;

        return /moderation/.test(modelId);
      }

      static supportsReasoning(modelId: string): boolean {
        const model = ModelRegistry.find(modelId, "openai");
        if (model?.capabilities?.includes("reasoning")) return true;

        return /o\d|gpt-5/.test(modelId);
      }

      static supportsDeveloperRole(modelId: string): boolean {
        return /gpt-4o|o1|o3/.test(modelId);
      }

      static needsMaxCompletionTokens(modelId: string): boolean {
        return /o1|o3/.test(modelId);
      }

      static getModelType(
        modelId: string
      ):
        | "embeddings"
        | "audio"
        | "moderation"
        | "image"
        | "chat"
        | "audio_transcription"
        | "audio_speech" {
        Eif (this.supportsEmbeddings(modelId)) return "embeddings";
        if (/moderation/.test(modelId)) return "moderation";
        if (/embedding/.test(modelId)) return "embeddings";
        if (/dall-e|image/.test(modelId)) return "image";
        if (/whisper|transcribe/.test(modelId)) return "audio_transcription";
        if (/tts|speech/.test(modelId)) return "audio_speech";
        if (/audio/.test(modelId)) return "audio";
        return "chat";
      }

      static getModalities(modelId: string): { input: string[]; output: string[] } {
        const input = ["text"];
        const output = ["text"];

        const model = ModelRegistry.find(modelId, "openai");
        Iif (model?.modalities) return model.modalities;

        if (this.supportsVision(modelId)) input.push("image", "pdf");
        if (this.supportsTranscription(modelId)) input.push("audio");

        if (this.supportsImageGeneration(modelId)) output.push("image");
        Iif (this.supportsEmbeddings(modelId)) output.push("embeddings");
        if (this.supportsModeration(modelId)) output.push("moderation");

        return { input, output };
      }

      static getCapabilities(modelId: string): string[] {
        const caps = ["streaming"];
        const model = ModelRegistry.find(modelId, "openai");

        Iif (model) {
          model.capabilities.forEach((c) => {
            if (!caps.includes(c)) caps.push(c);
          });
          return caps;
        }

        if (this.supportsTools(modelId)) caps.push("function_calling");
        if (this.supportsStructuredOutput(modelId)) caps.push("structured_output");
        Iif (this.supportsEmbeddings(modelId)) caps.push("batch");
        if (/o\d|gpt-5/.test(modelId)) caps.push("reasoning");

        if (this.supportsImageGeneration(modelId)) caps.push("image_generation");
        if (this.supportsTranscription(modelId)) caps.push("transcription");

        return caps;
      }

      static normalizeTemperature(
        temperature: number | undefined,
        modelId: string
      ): number | undefined | null {
        if (/^(o\d|gpt-5)/.test(modelId)) return 1.0;
        Iif (/-search/.test(modelId)) return null;
        return temperature;
      }

      static formatDisplayName(modelId: string): string {
        const model = ModelRegistry.find(modelId, "openai");
        if (model?.name && model.name !== modelId) return model.name;

        return modelId.replace(/-/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
      }

      static getPricing(modelId: string): ModelPricing | undefined {
        return PricingRegistry.getPricing(modelId, "openai");
      }
    }